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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Experimental Removal of Microcystis aeruginosa
by Magnetic Clay Minerals Synergized
with CPAM and Adsorption Mechanism Study
1
School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
2
Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources and Ecological Protection
in Mining Area with High Groundwater Level, Huainan, 232001, China
Submission date: 2025-02-10
Final revision date: 2025-04-11
Acceptance date: 2025-05-17
Online publication date: 2025-07-12
Corresponding author
Tingyu Fan
School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
KEYWORDS
TOPICS
ABSTRACT
Cyanobacterial blooms, a harmful consequence of water eutrophication, necessitate efficient algal
removal strategies. This study synthesized magnetic bentonite and kaolinite via co-precipitation
by loading nano-Fe₃O₄ onto clay minerals. The materials were characterized using SEM, FTIR,
and XRD: single-factor experiments and response surface methodology (Box-Behnken
design) optimized parameters for algae removal. Optimal conditions included a 1:1 ratio of
magnetic clay minerals to cationic polyacrylamide (CPAM), pH 2, 10 min stirring (150 rpm),
and dosages of 0.8 g/L (magnetic bentonite) and 0.4 g/L (magnetic kaolinite). Further refinement via
response surface analysis yielded 92.13% algal cell removal with magnetic bentonite at 0.206 g/L,
12.9 min stirring, and 170.6 rpm. Mechanistic studies (Zeta potential, SEM, particle size analysis)
indicated that electrostatic adsorption between algae and magnetic clays formed flocs, subsequently
captured by CPAM networks. This rapid, efficient process highlights the potential of magnetic
clay-CPAM composites for treating eutrophic, algae-laden waters. The findings offer a technical
reference for sustainable water remediation.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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| ISSN: | 1230-1485 |
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